What is the main difference between natural selection and genetic drift?
Answer and explanation
Correct answer: Natural selection is linked with fitness, whereas genetic drift is linked with chance
Natural selection is non-random with respect to fitness: individuals with inherited traits that improve survival or reproduction tend to contribute more offspring. Genetic drift changes allele frequencies through random sampling, especially in small populations, and the change need not improve fitness. Both can alter populations over generations, but their causes differ. Therefore A states the essential distinction; C reverses it, while B and D are incorrect.
Frequently asked questions
What is the correct answer to this question?
Natural selection is linked with fitness, whereas genetic drift is linked with chance
Why is this the correct answer?
Natural selection is non-random with respect to fitness: individuals with inherited traits that improve survival or reproduction tend to contribute more offspring. Genetic drift changes allele frequencies through random sampling, especially in small populations, and the change need not improve fitness. Both can alter populations over generations, but their causes differ. Therefore A states the essential distinction; C reverses it, while B and D are incorrect.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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